Disk-sharpener.



No. 754,455. PATENTED MAR. 15, 1904.

'W. J. JULIAN.

DISK SHARPENER.

APPLICATION FILED APR. so. 1903.

N0 MODEL.

I QAHQQ UNITED ST TES Patented March 15, 1904.

' PATENT OFFICE.

VVILLIAM J. JULIAN, OF CHARLES CITY, IOWA.

DISK-SHARPEN ER.

SPECIFICATION formingpart of Letters Patent No. 754,455, dated March 15, 1904.

Application filed April 36, 1903. Serial No. 155,034. (No model.) i i simple, inexpensive, and efiicient device of this 3 character for sharpening the edges of disks used on harrows, cultivators, and other farm implements. I r

A further object of the invention is to provide a portable disk-sharpener in the form'of a pair of tongs one of the pivoted members of which is provided with a beveled wheel or roller adapted to bear against the dished or concaved'side of the disk, the opposite member being provided with a-pivoted arm or lever carrying a knife or sharpener and adapted to engage the convex side of the disk and sharpen the edge thereof when the same is thrown in contact therewith and the disk rotated.

The invention consists in the construction and novel combination and arrangement of parts hereinafter fully described. illustrated in the accompanying drawings,and pointed out in the claims hereto append ed, it being understood that Various changes in form,proprtion, and minor details of construction may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

In the accompanying drawings, Figure 1 is a perspective view of my improved disk-sharpener, showing the same applied to a harrowdisk. Fig. 2 is a detail sectional view of the cutting-sharpener and holder.

Similar numeralsof reference indicate corresponding parts in both figures of the drawings.

1 designatesaharrow or cultivator-disk, and 2 my improved sharpening-tool. The tool 2 is preferably in the form of a pair of tongs and consists of two levers 3 and 4:, pivoted together at 5 and formed with handles 6 and jaws 7 and 8. The jaw 7 is somewhat longer than the jaw 8, being curved outwardly, as shown, and provided with a reduced spindle 9, upon which is removably journaled an oppositely-beveled antifriction-roller 10, a nut 11 engaging the threaded end of the spindle and serving to hold the roller in place on the end of the jaw. The jaw 8lies substantially parallel with the handle 6, the end of the jaw being provided with a reduced spindle 12, upon which is journaled a lever 13, said lever being held in po-.

inclined or beveled face of theroller 10 engaging the concaved portion of the disk, preventing friction as the disk is rotated and holding the same'in position while the knife 17 is at work on the opposite side sharpening the edge of the disk.

By having the lever 13, carrying'the knife or sharpener, pivoted to one of the jaws a greaterleverage is obtained, and consequently the pressure of the knife against the periphery of the disk materially increased.

In operation when it is desired to sharpen a disk the tool is applied to the disk with the roller 10 engaging the concave portion and the knife or sharpener in contact with the edge of the disk on the oppositeside thereof. The disk is now rotated in any suitable manner and pressure applied to the handle of the lever 13, the edge of the disk as it revolves between the pivoted jaws of the tool being effectively sharpened by the knife 17.

By having one of the jaws outwardly curved and longer than the other it causes the tool to more firmly engage the disk, while by having the roller oppositely inclined or beveled and detachably secured. to the spindle saidroller may be reversed to accommodate different-size disks.

From the foregoing description it will be seen that I have provided an extremely simple, inexpensive, and efficient device by means of which barrow-disks and the like may be quickly and readily sharpened without the employment of skilled labor.

Having thus described the invention, what I claim, and desire to secure by Letters Patent, is

1. A disk-sharpener comprising a pair of pivoted members, a roller carried by one of the members, a lever pivoted to the opposite member and a knife or sharpener carried by the lever.

2. A disk-sharpener comprising a pair of pivoted jaws, an antifriction-roller carried by one of the jaws, a lever provided with an angular extension pivoted to the opposite jaw,

guides formed in the angular extension and a knife fitting within the guides.

3. A disk-sharpener comprising a pair of pivoted jaws, an oppositely inclined or beveled antifriction-roller carried by one of the jaws and a lever provided with a knife or sharpener pivoted to the opposite jaw and arranged at right angles thereto.

In testimony that I claim the foregoing as my own I have hereto afiixed my signature in the presence of two witnesses.

WILLIAM J. JULIAN. 

